src/network/netdev/macvlan.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <net/if.h>
   4
   5 #include "conf-parser.h"
   6 #include "macvlan.h"
   7 #include "macvlan-util.h"
   8
   9 DEFINE_CONFIG_PARSE_ENUM(config_parse_macvlan_mode, macvlan_mode, MacVlanMode, "Failed to parse macvlan mode");
  10
  11 static int netdev_macvlan_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *req) {
  12         MacVlan *m;
  13         int r;
  14
  15         assert(netdev);
  16         assert(link);
  17         assert(netdev->ifname);
  18
  19         if (netdev->kind == NETDEV_KIND_MACVLAN)
  20                 m = MACVLAN(netdev);
  21         else
  22                 m = MACVTAP(netdev);
  23
  24         assert(m);
  25
  26         if (m->mode == NETDEV_MACVLAN_MODE_SOURCE && !set_isempty(m->match_source_mac)) {
  27                 Iterator i;
  28                 const struct ether_addr *mac_addr;
  29
  30                 r = sd_netlink_message_append_u32(req, IFLA_MACVLAN_MACADDR_MODE, MACVLAN_MACADDR_SET);
  31                 if (r < 0)
  32                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_MACVLAN_MACADDR_MODE attribute: %m");
  33
  34                 r = sd_netlink_message_open_container(req, IFLA_MACVLAN_MACADDR_DATA);
  35                 if (r < 0)
  36                         return log_netdev_error_errno(netdev, r, "Could not open IFLA_MACVLAN_MACADDR_DATA container: %m");
  37
  38                 SET_FOREACH(mac_addr, m->match_source_mac, i) {
  39                         r = sd_netlink_message_append_ether_addr(req, IFLA_MACVLAN_MACADDR, mac_addr);
  40                         if (r < 0)
  41                                 return log_netdev_error_errno(netdev, r, "Could not append IFLA_MACVLAN_MACADDR attribute: %m");
  42                 }
  43
  44                 r = sd_netlink_message_close_container(req);
  45                 if (r < 0)
  46                         return log_netdev_error_errno(netdev, r, "Could not close IFLA_MACVLAN_MACADDR_DATA container: %m");
  47         }
  48
  49         if (m->mode != _NETDEV_MACVLAN_MODE_INVALID) {
  50                 r = sd_netlink_message_append_u32(req, IFLA_MACVLAN_MODE, m->mode);
  51                 if (r < 0)
  52                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_MACVLAN_MODE attribute: %m");
  53         }
  54
  55         return 0;
  56 }
  57
  58 static void macvlan_done(NetDev *n) {
  59         MacVlan *m;
  60
  61         assert(n);
  62
  63         if (n->kind == NETDEV_KIND_MACVLAN)
  64                 m = MACVLAN(n);
  65         else
  66                 m = MACVTAP(n);
  67
  68         assert(m);
  69
  70         set_free_free(m->match_source_mac);
  71 }
  72
  73 static void macvlan_init(NetDev *n) {
  74         MacVlan *m;
  75
  76         assert(n);
  77
  78         if (n->kind == NETDEV_KIND_MACVLAN)
  79                 m = MACVLAN(n);
  80         else
  81                 m = MACVTAP(n);
  82
  83         assert(m);
  84
  85         m->mode = _NETDEV_MACVLAN_MODE_INVALID;
  86 }
  87
  88 const NetDevVTable macvtap_vtable = {
  89         .object_size = sizeof(MacVlan),
  90         .init = macvlan_init,
  91         .done = macvlan_done,
  92         .sections = NETDEV_COMMON_SECTIONS "MACVTAP\0",
  93         .fill_message_create = netdev_macvlan_fill_message_create,
  94         .create_type = NETDEV_CREATE_STACKED,
  95         .generate_mac = true,
  96 };
  97
  98 const NetDevVTable macvlan_vtable = {
  99         .object_size = sizeof(MacVlan),
 100         .init = macvlan_init,
 101         .done = macvlan_done,
 102         .sections = NETDEV_COMMON_SECTIONS "MACVLAN\0",
 103         .fill_message_create = netdev_macvlan_fill_message_create,
 104         .create_type = NETDEV_CREATE_STACKED,
 105         .generate_mac = true,
 106 };